package org.example.javawebday1.utils;

import com.aliyun.oss.*;
import com.aliyun.oss.common.auth.CredentialsProviderFactory;
import com.aliyun.oss.common.auth.EnvironmentVariableCredentialsProvider;
import com.aliyun.oss.common.comm.SignVersion;
import com.aliyun.oss.model.PutObjectRequest;
import com.aliyun.oss.model.PutObjectResult;
import lombok.Data;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.Objects;
import java.util.UUID;

@Component
@Data
public class OSSOperation {

    // 填写Bucket名称，例如examplebucket。
    @Value("${aliyun.oss.bucketName}")
    String bucketName;

    // 填写Bucket所在地域。以华东1（杭州）为例，Region填写为cn-hangzhou。
    @Value("${aliyun.oss.region}")
    String region;

    @Value("${aliyun.oss.endpoint}")
    String endpoint;


    public String fileUpload(MultipartFile file) throws com.aliyuncs.exceptions.ClientException {

        // 从环境变量中获取访问凭证。运行本代码示例之前，请确保已设置环境变量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。
        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();

        // 创建OSSClient实例。
        // 当OSSClient实例不再使用时，调用shutdown方法以释放资源。
        ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration();
        clientBuilderConfiguration.setSignatureVersion(SignVersion.V4);
        OSS ossClient = OSSClientBuilder.create()
                .endpoint(endpoint)
                .credentialsProvider(credentialsProvider)
                .clientConfiguration(clientBuilderConfiguration)
                .region(region)
                .build();
        String objectName = LocalDate.now().format(DateTimeFormatter.ofPattern("yyyyMM")) + '/' + UUID.randomUUID() + Objects.requireNonNull(file.getOriginalFilename()).substring(file.getOriginalFilename().lastIndexOf('.'));


        try {
            // 填写Byte数组。
//            String objectName = "test.txt";
//            byte[] content = "Hello OSS, 你好世界".getBytes();
            byte[] content = file.getBytes();


            // 创建PutObjectRequest对象。
            PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName, objectName, new ByteArrayInputStream(content));

            // 创建PutObject请求。
            PutObjectResult result = ossClient.putObject(putObjectRequest);
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } catch (IOException e) {
            throw new RuntimeException(e);
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }

//        https://java-web-wzm.oss-cn-hangzhou.aliyuncs.com/test.txt
//        endpoint: https://oss-cn-hangzhou.aliyuncs.com
//        bucketName: java-web-wzm
//        region: cn-hangzhou
        return endpoint.split("//")[0] + "//" + bucketName + "." + endpoint.split("//")[1] + "/" + objectName;
    }

}
